Silicon Dioxide & HTV Silicone: The Science of Strength
Silicon dioxide (SiO₂), commonly called silica, is the key reinforcing filler in High-Temperature Vulcanizing (HTV) silicone rubber. When combined with our custom-formulated HTV base polymers, it enables:
- Tensile strength up to 12 MPa (ASTM D412)
- Tear resistance over 35 kN/m (ASTM D624 Die B)
- Continuous service from -60°C to 250°C
- Shore A hardness range 30-90 with ±2° consistency
Why Our SiO₂ Optimizes HTV Processing & Performance
Technical Specifications of Industrial-Grade Silica
| Parameter | Standard Grade | Premium Grade (Ours) | Benefit for HTV |
|---|---|---|---|
| Purity (SiO₂ content) | 98.5% | 99.9%+ | Reduces curing defects |
| Particle Size (D50) | 15μm | 5-12μm | Improves dispersion in extrusion |
| BET Surface Area | 160 m²/g | 200-350 m²/g | Enhances tensile strength |
| pH Value | 6.8 | 6.2-6.5 | Stabilizes peroxide cure |
Proven Results:
- 23% shorter molding cycles vs. conventional silica (180°C vulcanization)
- 0.02% batch-to-batch variance in viscosity (ISO 2555)
5 Critical HTV Applications Enabled by Our SiO₂ Formulations
- Automotive Gaskets
- Performance: Withstands 10,000+ thermal cycles (SAE J2238)
- Client Case: Reduced warranty claims by 65% for EV battery seals
- Industrial Rollers
- Technical Spec: Maintains 85±3 Shore A under 10kN/m² pressure
- High-Voltage Insulators
- Certification: Passed 100kV/mm dielectric test (IEC 60243)
- Medical Tubing
- Compliance: USP Class VI & ISO 10993 certified batches
- Consumer Goods Molding
- Surface Quality: Ra <0.8μm for Class A cosmetic parts
Process-Specific Advantages for Manufacturers
Compression Molding
- 15-25% faster demolding with our low-porosity silica
- Achieve <0.1mm flash in multi-cavity tools
Extrusion Profiles
- Smooth surface finish even at 60m/min line speeds
- Maintain ±0.05mm tolerance on complex cross-sections
Injection Molding
- 800-1500 MPa·s optimal viscosity for thin-wall parts
Competitive Edge: Our SiO₂ vs Traditional Fillers
| Property | Our SiO₂ HTV | Carbon Black HTV | Calcium Carbonate HTV |
|---|---|---|---|
| Reinforcement Factor | 3.5X | 2.1X | 1.3X |
| Color Options | Transparent | Black Only | White/Gray |
| High-Temp Aging | ΔShore A<5° | ΔShore A>15° | ΔShore A>20° |
| FDA Compliance | Yes | No | Limited |
Verified Customer Outcomes
Electronics Manufacturer Testimonial:
“Switching to TNSILICONE HTV with nano-silica cut our extrusion scrap rate from 8.2% to 1.7% in 6 months.”
Automotive Supplier Data:
- 28% improvement in compression set resistance (70hrs/175°C)
- 50% longer mold life vs. abrasive fillers
CTA Section:
[Download Free HTV Silica Selection Guide]
[Request Custom Compound Prototyping]
